Personality Traits 

+Positive characteristics+ -Negative characteristics-  
A 
 active, adaptable, adventurous, affectionate, agreeable, aggressive, amazing, ambitious, alert, amusing, artistic, assertive, attractive 		A
absent-minded, arrogant, awful, awkward
B
beautiful, brave, bright 		B
bold (behavior), boring
C
capable, carefree, careful, charismatic, charming, 
clear, competent, confident, conformist, conscientious, consistent, cooperate, courageous, courteous, creative, (critical) 		C
careless, changeable, cheap, clumsy, cold, condescending, cold-blooded, conservative, cowardly, crazy, cruel
D
diplomatic, deep and philosophical, dependable,
determined, diligent, discerning, discreet 		D
demanding, dependent, depressive, despondent, difficult, disgusting, dishonest, disagreeable, dominant
dominating/commanding, domineering, dull, dumb
E
easy, easygoing, economic, efficient, effusive, 
eloquent, energetic, engaging, enthusiastic, excellent, extraordinary, exotic, extroverted, exuberant 		E
eccentric, effeminate, emotional, erratic, extravagant
F
faithful, fantastic, fervent, firm, flexible, friendly,  
 frugal, funny 		F
fastidious, flatterer (n.), flatulent, fretful, fussy
G
generous, gentle, gorgeous, graceful, great 		G
gloomy, gossipy, greedy
H
honest 		H
hasty, haughty, heartless, hesitant, hypocritical
I
imaginative, independent, individualistic, intellectual,
intelligent, interesting 		I
ill-tempered, impatient, impolite, impractical, impulsive, inattentive, indecisive, indifferent, introverted
K
kind 		¡@
L
liberal, lively, logical, loving, loyal 		L
lazy, lousy, lunatic
M
magnificent, marvelous, merciful, methodical, 
 meticulous, moderate 		M
materialistic, mean, messy, moody, moron,
N
neat, nice 		N
narrow-minded, nasty, nervous, noisy, nosy
O
open-minded, optimistic, outgoing, outspoken 		¡@
P
passionate, painstaking, patient, peaceful, perceptive, persistent, pious, polite, popular, precise, punctual 		P
pansy, parsimonious, passive, peculiar, peevish, pessimistic, petty, procrastinating, proud
Q
quiet, 		¡@
R
rational, responsible, resolute, restless 		R
radical, rebellious, reserved, rude, ruthless
S
sensitive, sensible, simple and plain, sincere, smart, sociable, sophisticated, sparkling, special, splendid, straightforward, superb, systematic 		S
selfish, sentimental, shallow, short-tempered, shy, 
simple-minded,  sissy, sleazy, sloppy, slow, sneaky, snobbish, snoop, snooty, sordid, sticky, stingy, strict, stubborn,  stuck-up, stupid, suspicious
T
tactful, tenacious, terrific, thoughtful, thrifty 		T
talkative, temperamental, tense, terrible, thriftless, timid, too conceited, tough, tyrant
U
upright 		U
unsettled, unkind, unmanly, unpleasant, unsophisticated, untrustworthy
V
versatile 		V
vain, violent,vulgar, wasteful
W
witty, wonderful 		W
weird, wild

All definitions taken from the Collins Cobuild English Dictionary
and Merriam-Webster Online Dictionary
http://www.m-w.com